Gas-phase flame synthesis and characterization of iron oxide nanoparticles for use in a health effects study

Bing Guo, Ian M. Kennedy

Research output: Contribution to journalArticle

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Iron oxide nanoparticles, to be used in a health effects study, were synthesized in a H2/air diffusion flame and characterized by transmission electron microscopy, X-ray diffraction, surface area measurement, inductively coupled plasma mass spectrometry, and a spectrophotometric speciation method. The nanoparticles exhibited the maghemite (γ-Fe2O3) crystal structure and contained only trivalent iron. There were two size modes in the particles. The large size mode contained crystalline, non-agglomerated particles with a median diameter of approximately 45 nm; the small size mode contained particles that were in the size range of 3-8 nm and were mostly amorphous. Depending on the value taken for the small particle size, the small mode accounted for 73-82% of the particle surface area. The particles in the small size mode were likely formed from the vapor of FeO and Fe.

Original languageEnglish (US)
Pages (from-to)944-951
Number of pages8
JournalAerosol Science and Technology
Issue number10
StatePublished - Oct 2007


ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Mechanical Engineering

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